CN103091126B - Overhead crane test improved method - Google Patents
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- CN103091126B CN103091126B CN201310053400.4A CN201310053400A CN103091126B CN 103091126 B CN103091126 B CN 103091126B CN 201310053400 A CN201310053400 A CN 201310053400A CN 103091126 B CN103091126 B CN 103091126B
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- 238000012360 testing method Methods 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000010998 test method Methods 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 abstract description 12
- 239000010959 steel Substances 0.000 abstract description 12
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000007246 mechanism Effects 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000004904 shortening Methods 0.000 abstract 1
- 238000002474 experimental method Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
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- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to an overhead crane test improved method, and belongs to the technical field of crane overhaul and maintenance. The overhead crane test improved method comprises the following steps of calculating the test load with 10% overload of dynamic loads, calculating the largest pulling force each steel wire rope can bear, determining the weight of a hoisting weight test block, determining the length of each steel wire rope, determining lifting speed and determining a load test method, wherein the load test method comprises the steps of fixing two steel wire ropes at two ends of a coiling block, and connecting the steel wire ropes with the weight test block after a safety number of circles of the steel wire ropes are wound at each side; with the test time being 15 seconds, lifting slightly the weight test block firstly, then dropping the weight test block, again lifting the weight test block by 10 centimeters, stopping to observe a band-type brake, then lifting the weight test block to 2 meters if no problems exist and stopping to drop the weight test block. The test is then completed if no problems exist after a brake and a mechanism transmission part are observed. The overhead crane test improved method has the advantages of saving cost, shortening work period, guaranteeing safety, reducing labor intensity, improving efficiency and the like.
Description
technical field
The present invention relates to the test of a kind of overhead travelling crane to improve one's methods, belong to crane maintenance, maintenance technology field.
Background technology
In the prior art, overhead travelling crane belongs to special equipment.Country expressly provides that every two years carrying out a load test carries out, and testing requirements carries out dynamic loading experiment with the weight of 1.1 times, and is supervised the implementation of by special equipment inspection department.All adopt the rated load weight of crane loading 1.1 times to carry out when doing experiment in the past.The biggest lifting capacity as specified in crane is 250t, and the weight of test needs 275t.Scene every two years will from other places, and the steel transporting enough weight are tested to scene as load, and from being transported to lease needs tens0000 yuan, even dress band unloads and adds the experiment work that traffic requirements one wheat harvesting period can complete whole crane.This not only makes testing crew dog-tired, but also the scene that makes is full of steel, make to be all danger very putting load, the steel of six or seven meters high will cave in slightly because of carelessness at every turn, cause the great person and equipment breakdown, whole test also exists major hidden danger.
Summary of the invention
The object of the invention is for above-mentioned deficiency and provide one to improve one's methods, testing the test of feasible, that safety, efficiency are high overhead travelling crane and improve one's methods.
Technical solution of the present invention is: a kind of overhead travelling crane test is improved one's methods, and its step is as follows:
(1) press overload 10% and calculate test load.
(2) calculate every root wire rope and bear maximum pull.
(3) lifting test mass block weight is determined.
(4) rope capacity is determined.
(5) pulling speed is determined.
(6) load test method:
A, fix two wire rope at reel two ends, after often end is wound around safe number of turns, wire rope is connected with test block.
Test mass block, by 15 seconds, is first mentioned a little, is then fallen by b, test period. and test mass block is mentioned 10 centimeters, stop, observe band-type brake, no problem continues to rise to 2m and stops, and then falls, and observes detent, mechanical driving part is no problem.
Preferred overhead travelling crane test is improved one's methods, and its step is as follows: lifting weight 250 tons of crane meters:
(1) press overload 10% and calculate test load: be 275 tons.
(2) calculate every root wire rope and bear maximum pull: 19.03 tons.
(3) lifting pouring weight weight is determined: 38 tons.
(4) rope capacity is determined: 104 meters.
(5) pulling speed is determined: 8m/min.
Advantage of the present invention is: 1, by improving rear test method, the test of bridge machine adopts the method reducing pulley block ratio, carries out the test of lifting mechanism dynamic load, has saved cost, shortens the duration, ensure that safely, reduces labour intensity, improves efficiency.No longer just can save tens0000 yuan of funds from nonlocal transport rental steel as load single one.2, the crane test period shortened to present week age by one month, and it is just enough that required personnel are also half in the past, and the personnel labor intensity of test also reduces greatly.
Below in conjunction with accompanying drawing, embodiment, embodiments of the present invention are described in further detail.
Accompanying drawing explanation
Fig. 1 is that the inventive method plays rearrangement schematic diagram.
Embodiment
Embodiment
See Fig. 1, main parts size title is as follows: hoist roller 1, test mass block 2, fixed pulley group 3, running block 4, gear case 5, detent 6, motor 7, wire rope.
Overhead travelling crane test is improved one's methods, and its step is as follows:
One, overhead travelling crane basic parameter
Model: 9.8 × 2 × 250/50/10KN---Shanxi Tai Chong factory produces.
Number of units: 2,4 lifting mechanisms.
Main hook lifting velocity: 1m/min.
Wire rope 8 number of share of stock: 2 × 8.
Wire rope 8 working pulling force: 17.9 × 9.8KN.
Wire rope 8 structure and diameter: 6W(19)-155; ￠ 40mm.
Drum diameter: ￠ 1390mm.
250 tons of hook gear weight: 6553Kg.
Running block and suspension hook side plate weight: 4588 Kg.
Mechanical reduction gear overall ratio: 326.03.
Two, testing program
Adopt the method cancelling whole pulley blocks to carry out, achieve successfully.Be calculated as follows:
1, consider that overload 10%(is dynamic load overload 10%) press, 250 × 10%+250=275(T) calculate test load.
2, every root wire rope 8 bears maximum pull (S):
In formula: pulling force (T) suffered by S-steel cable 8 (not counting wire rope 8 weight).Q-considers the outer load 275 tons of overload 10%.Carrying rope point number 16 in n rope-pulley blocks.The efficiency 0.94 of η rope-pulley blocks.G-suspender weight 11.2T.
So: S=(275+11.2)/(16 × 0.94)=19.03(T).
3, test mass block weight P
The weight of pulley blocks and suspension hook do not remembered during test, directly draw lower two wire rope 8 by reel (1) and be connected with test mass block 2, the pulling force that every root wire rope 8 bears is 9.8 × 19KN
P=4 × S=2 × 19 × 9.8=372.4KN=38(T), test mass block weight is 38 tons.
4, wire rope 8 length
Length clipping room floor calculating wire rope 8 is dropped on by test mass block 2
L=πDgZo+h+C
In formula: Dg-drum diameter, get Dg=1.39m; Zo-safe number of turns, gets Zo=6 circle; H-wire rope 8, from reel 1 horizontal centre to wire rope 8 stiff end length, gets h=24.13m.
So L=3.14 × 1.39 × 6+24.13+1.25=51.57m, get 52m.Two wire rope 8 total lengths are 104m.
Three, test method
1, load test method
Fix two wire rope 8 at reel 1 two ends, after often holding winding 6 to enclose safe number of turns, wire rope 8 is connected with test mass block 2.
2, weight is tested
Test mass block 2 weight is 38t.The existing little balance beam of power plant is utilized to do test mass thing.Two little balance beams add suspension hook deadweight for 38.14t, meet the demands.
3, heavy lift height
Do not fill pulley because of during test, the pulling speed of test mass thing equals the speed of reel 1
V=πDn
In formula: the pulling speed of V-weight; D-drum diameter, D=1.39m.
N=n electricity/I
N electricity-motor speed, n electricity=870r/m.I-overall ratio, I=490.231.
N=870/490.231=1.775r/min。
So V=3.14 × 1.39 × 1.775=7.75m/min, get 8m/min
Test period was by 15 seconds, and hoisting depth is 2m.
4 test methods
During test. first test mass block 2 is mentioned a little. then fall. again test mass block 2 is mentioned 10 centimeters, stop, observe band-type brake etc., no problem continues to rise to 2m and stops, and then falls, and it is no problem that detent 6, mechanical drive department grade.
Four, points for attention are tested
1, should check before test, band-type brake adjusts in advance comprehensively, can test run after each portion passed examination, first unloaded trial run, and after all are normal, application of load is tested again.
2, because test mass block downslide amount is large, will put flitch during test under test mass block, commander and operating personnel will strictly control lifting altitude.
3, in process of the test, each key position should have special messenger to guard, and the phenomenon that notes abnormalities should stop test immediately, and test mass block rises and falls must be steady, strictly controls speed of rising and falling.
4, work-yard will be cleaned totally, and forbid storage equipment near test site, non-test personnel must not enter test site, so as to avoid an accident.
5, safety is given and is stayed more than long necessary six circles of rope, prevents test steels silk rope 8 from coming off and hurts sb.'s feelings or damage equipment.
6, because test steels silk rope 8 and former machine wire rope 8 are not same models, end holding clamp needs again to make new jig, to meet testing requirements.
Claims (1)
1. an overhead travelling crane test is improved one's methods, and it is characterized in that step is as follows:
(1) press overload 10% and calculate test load;
(2) calculate every root wire rope (8) and bear maximum pull;
(3) lifting test mass block (2) weight is determined;
(4) wire rope (8) length is determined;
(5) pulling speed is determined;
(6) load test method:
A, fix two wire rope (8) at reel (1) two ends, after often end is wound around safe number of turns, wire rope (8) is connected with test mass block (2);
Test mass block (2), by 15 seconds, is first mentioned a little, is then fallen by b, test period, again test mass block (2) is mentioned 10 centimeters, stop, observe band-type brake, no problem continues to rise to 2m and stops, and then falls, and observes detent (6), mechanical driving part is no problem;
In lifting weight 250 tons of cranes:
(1) press overload 10% and calculate test load: be 275 tons;
(2) calculate every root wire rope (8) and bear maximum pull: 19.03 tons;
(3) lifting test mass block (2) weight is determined: 38 tons;
(4) wire rope (8) length is determined: 104 meters
(5) pulling speed is determined: 8m/min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310053400.4A CN103091126B (en) | 2013-02-19 | 2013-02-19 | Overhead crane test improved method |
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| CN201310053400.4A CN103091126B (en) | 2013-02-19 | 2013-02-19 | Overhead crane test improved method |
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| CN103091126B true CN103091126B (en) | 2015-06-24 |
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| CN103674601A (en) * | 2013-12-25 | 2014-03-26 | 中国水电顾问集团成都勘测设计研究院有限公司 | Method for analyzing working efficiency of cable crane in concrete construction |
| CN109540568B (en) * | 2019-01-08 | 2024-01-26 | 北京市城市管理研究院（北京市环境卫生监测中心） | Side driving device of road sweeper cleaning performance test bed |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4697458A (en) * | 1986-11-21 | 1987-10-06 | Billstein Herbert H | Crane load-test gauge |
| CN101886985A (en) * | 2010-06-29 | 2010-11-17 | 太平湾发电厂 | Dynamic load test method of load lifting capacity of bridge crane |
-
2013
- 2013-02-19 CN CN201310053400.4A patent/CN103091126B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4697458A (en) * | 1986-11-21 | 1987-10-06 | Billstein Herbert H | Crane load-test gauge |
| CN101886985A (en) * | 2010-06-29 | 2010-11-17 | 太平湾发电厂 | Dynamic load test method of load lifting capacity of bridge crane |
Non-Patent Citations (3)
| Title |
|---|
| 《桥式起重机机械系统故障及维修》;李勇等;《中国电机工程学会第十届青年学术会议·吉林》;20081231;第3299页 * |
| 《漫湾水电站二期工程主厂房双小车桥机安装技术》;宋长斌;《水力发电》;20070530;第33卷(第5期);第66-68页 * |
| 《葛洲坝大江电站厂内双小车桥式起重机的负荷试验》;李正安;《水电站机电技术》;19880430(第2期);第30-33页、第52页 * |
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Inventor after: Li Yong Inventor after: Liu Fujia Inventor after: Dai Xiangwen Inventor after: Liu Guiren Inventor after: Zhang Dehao Inventor after: Hu Haiping Inventor after: Luan Chunlin Inventor after: Li Pengji Inventor after: Bo Jixun Inventor after: Jia Ligang Inventor before: Li Yong Inventor before: Dai Xiangwen Inventor before: Liu Guiren Inventor before: Zhang Dehao Inventor before: Hu Haiping Inventor before: Luan Chunlin Inventor before: Li Pengji Inventor before: Bo Jixun Inventor before: Jia Ligang |
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Free format text: CORRECT: INVENTOR; FROM: LI YONG DAI XIANGWEN LIU GUIREN ZHANG DEHAO HU HAIPING LUAN CHUNLIN LI PENGJI BU JIXUN JIA LIGANG TO: LI YONG DAI XIANGWEN LIU GUIREN ZHANG DEHAO HU HAIPING LUAN CHUNLIN LI PENGJI BU JIXUN JIA LIGANG LIU FUJIA |
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Effective date of registration: 20171026 Address after: 132000 Jilin Jilin Huadian Baishan town production complex building Co-patentee after: State Grid Corporation of China Patentee after: Songhua River hydropower generation Co., Ltd. Jilin Baishan power plant Co-patentee after: State Grid Xinyuan Hydropower Co., Ltd. Address before: 132400, No. 274, Huadian Avenue, Huadian, Jilin, Jilin Co-patentee before: State Grid Corporation of China Patentee before: Baishan Power Plant Co-patentee before: State Grid Xinyuan Hydropower Co., Ltd. |